A safe home is a happy one, but many off-the-shelf surveillance cameras are too expensive or simply impractical for home use. That`s why designer Alberto Ricci Bitti created an automated and inexpensive surveillance camera that uses a flash card as recording media. All the required functionalities fit inside a small 8-bit microcontroller and the d
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esign harnesses the potential of the ATmega32: almost every hardware component of the AVR is put to good use, resulting in a leaner, more cost-effective parts list. The camera only needs to be set up once and an IR remote and easy-to-use voice-prompt menu means this award-winning design will be the star of the show. Video surveillance systems have rapidly grown from being a specialized equipment for high-risk areas (like banks and airports), to the point of being standard facilities of most places open to the public. Nowadays, no shopping centre, office, industry can afford lacking one. In conjunction with a time-lapse video recorder, these little cameras play an active role discouraging theft and collecting evidences and precious information about the offenders. Despite their huge commercial success, video surveillance recorders have had little impact on residential markets. No doubt they would be useful at home as well as they are at work: according to the Police, most home thieves go unpunished, so in a sense homeowners must help for themselves. Commercially available systems are not designed for home use, and unfortunately don`t adapt well to the new role. Problems start with the time-lapse recorder, which is a special recorder capable of recording several days of slow-frame-rate video on an ordinary VHS tape or a big hard disk. Most units are solidly built and usually they worth their money, nonetheless my concept of...
This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of....
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is....
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to....
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This....
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the....
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound,....
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the....
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power....
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....
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